Braiding machine



Sept. 4, l 934.

Filed March 9, 1932 F. DICK 1,972,131

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Sept. 4, 1934; 'EDmK 1,972,131

BRAIDING MACHINE I Filed March 9,.1952 3 Sheets-Sheet 3 mvsnron Y 1 FEDERICO DICK.

ATTORNEYS Patented Sept. 4, 1934 v nnsmmc MACHINE Federico Dick, Monza, Italy Applicltitir March 9, 1932, Serial No. 597,749

Ill-Italy July 29, 1931 'IClalms- (cum-s) The subject of this invention is a braiding machine wherein each of the toothed wheels serving as the gearing for the spindle or stud carriers is provided with a trunnion or hub which allows it 6' to rotate in a suitable hole or bearing in the plate carrying the gear wheels and also in a hole or hearing formed in a ring or flange completing the said plate and made integral therewith, for example, by forming part of the same casting. In one constructional form, holes or bearings can be formed in bosses or distance pieces provided on the plate. Moreover, the toothed wheels transmitting motion to each stud have helicoidal teeth which ensures a proper and continuous engagement of adjacent wheels and consequently a progressive transfer of the studs from one wheel to another.

Moreover, in such machines, the core carrying thread guides are secured at their lower ends by a hollow screw serving as a plug, the hubs of the toothed wheels being in this case suitably perforated.-

The machine which is the subject of this invention is clearly distinguished from prior machines by the construction and operation of these gears. It allows defects of operation observed in other machines with travelling spindles or studs to be avoided, for example, the shock of the spindle or stud striking against the guide grooves v 1 at the crossing points which results in a rapid attrition of the guides, this result being obtained by making the guide grooves with contours such that the movement of the spindle is along a straight line at these crossings.

From the following description with reference to the accompanying drawings it will be seen, by way of example, how the said invention can be carried into practice. In these drawings:

Figure 1 is a plan of the gears.

Figure 2 is a side view thereof.

Figure 3 is a plan view of the mechanism with the gears removed in order to show the plate with the guide grooves for the spindles or studs.

Figure 4 shows a section onthe line 4-4, Figure 1.

Figure 5 is a view of the underside of the plate partly in section on the line 5-5, Figure2.

Figure 6 shows a transverse section similar to that shown in Figure 4 illustrating a modified arrangement.

Figures 7, 8 and 9 show, respectively, a plan, side view and central section of one of the toothed wheels with the corresponding trunnions serving as a pivot.

As shown in these drawings, the braiding machine comprises a plate A of suitable profile cast integrally with a second perforated plate or ring A, forming a flange; in the plate A, in a known manner, grooves E are formed to guide the studs during their movements and serve as a track for these studs (Figures 3, 4 and 6). The said ,grooves are arranged in such a manner that at their crossings the stud is moving along a straight path and does not strike against angular parts so as to cause rapid deterioration of the studs as is the case in other known machines with travelling studs. These grooves can be cast in the plate but are preferably formed by a milling operation.

0n the plate A are mounted sets of gearing comprising a convenient number of toothed wheels Z each provided with a trunnion or hub C serving as a pivot which passes through a hole or-bearing I and is rotatably stepped in a blind circular hole ,or hearing I provided in the ring or flange A, carried below the plate A.

The toothedwheels Z. are rotatably supported by their trunnions or hubs C mounted in the holes or bearings I and I and thus it is not necessary that they should be of a great width. This makes 8 for a light construction of the machine whilst on the contrary in other machines with the usual gearing in order that they may be sufllciently stable and rigidly supported on the spindles the toothed wheels are made large and heavy; more-, 85. over such toothed wheels "have straight teeth which are thin and consequently relatively weak.

In order to avoid incorrect meshing of the gears in consequence of defects in the teeth at the part of the toothed wheel corresponding to the notch 9Q D, and also due to the very presence of thosenotches themselves, where teeth are lacking, which notch carries the stem of the stud during the passage of the latter fromone to another toothed wheel, as may occur in machines with 05 straight teeth, and also to prevent noise due to the stud not being guided but being actually thrown in the present machine, a plate or wheel B is provided having helicoidal teeth which are so milled while the notch D is so cut that in each case the tooth corresponding to the notch D is not entirely but only in part cut away. It is thus evident in Figure 8, for example, that the slot or notch D has substantially equal tooth portions disposed at the sides thereof. In this manner adjacent toothed wheels are in permanent mesh and the spindle is guided properly and silently from one to another tooth or notch. The machine is thus less cumbersome, is simpler and has no screws or nuts on its upper part.

Such defects as indicated above, including noise, wear and tear and wrong meshing of the gears constitute an array of serious troubles which occurs in other machines with travelling spindles and provided with gear wheels having straight teeth. In the machine according to this invention this defect can be avoided by using a plate providedwith helicoidal milling serving to gear together the spindle carriers and allowing the teeth at the groove to be only partly cut away so that adjacent toothed wheels are in gear continuously and carry the spindle correctly and silently from one wheel to another.

Compared with known braiding machines wherein a thread guide for conducting the core at the top of the stud passes through the hollow spindle around which the toothed wheel rotates, the machine according to this invention (Figure 9) is distinguished by the hub C of the toothed wheel being perforated at L for the passage of the thread guide M which is fixed by a perforated screw N serving also as a plug to prevent oil from dripping upon the cores beneath the machine.

Figure 6 shows another constructional form oi' themachine in accordance with this invention in which in place of the flange A, completing the gear carrying plate at its lower part, spaced distance pieces A are provided which are bored and guide the hubs of the toothed wheels throughout their length.

vI claim:

1. In a braiding machine provided with a plurality of meshing gears having peripheral openbelow said plate in spaced parallelism therewith and forming an additional support for said pins.

4. Braiding machine according to claim 1, wherein the peripheral openings in the helical gears are so distributed upon said gears with respect to the helical teeth thereon, that an equal portion of a tooth appears upon each side 0! each opening.

5. In a braiding machine provided with a plurality of meshing gears havingperipheral openings and adapted to drive and support the studs 0! the machine, means for'insuring the meshing of said gears in spite of the presence of the openings therein including helical teeth upon said gears, a guide plate having grooves to guide said studs, downwardly extending hollow pins for journaling said gears to said guide plate, a flange secured below said plate and also supporting said pins, thread guides extending through said pins and projecting upwardly therefrom, and means securing said thread guides to the lower portion of the guide plate.

6. A braiding machine according to claim 1, wherein the downwardly extending pins or the toothed wheels are hollow, and the machine is provided with thread guides extending through the hollow pins and projecting upwardly therefrom and means securing said thread' guides to the lower portion of the guide plate.

7. A braiding machine according to claim 1, wherein the downwardly extending pins or the toothed wheels are hollow, and the machine is provided with thread guides extending through the hollow pins and projecting upwardly therefrom and axially hollow screws directed upward from the underside of the guide plate securing said thread guides thereto.

FEDERICO. DICK. 

